Officially, only one trial per device. Unofficially, some users uninstalled using the kavremover tool and reinstalled, but that often required a registry clean.
The 2015 free trial provided to all premium features for 30 days. After the trial, you had to purchase a license to continue receiving updates. kaspersky internet security free trial 2015
Leo stared at the button. He didn't have the money for a full license, not this month. The trial was his only shot. He slammed the mouse button down on 'Activate'. Officially, only one trial per device